import java.io.IOException;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Gao zhao xu
 * Date: 2023-11-06
 * Time: 11:00
 */
public class asd {
    public static void main(String[] args) throws IOException{
        int c;
            c = System.in.read();
            while()
}
